EP0769318B1 - Device and process for cleaning filter elements - Google Patents

Device and process for cleaning filter elements Download PDF

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Publication number
EP0769318B1
EP0769318B1 EP96111477A EP96111477A EP0769318B1 EP 0769318 B1 EP0769318 B1 EP 0769318B1 EP 96111477 A EP96111477 A EP 96111477A EP 96111477 A EP96111477 A EP 96111477A EP 0769318 B1 EP0769318 B1 EP 0769318B1
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EP
European Patent Office
Prior art keywords
filter
pulse gas
pulse
shut
cleaning
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96111477A
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German (de)
French (fr)
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EP0769318A1 (en
Inventor
Günther Dehn
Joachim Schmitt
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Lurgi Energie und Entsorgung GmbH
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Lurgi Energie und Entsorgung GmbH
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Publication of EP0769318A1 publication Critical patent/EP0769318A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2407—Filter candles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
    • B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air

Definitions

  • the invention relates to an apparatus and method for Cleaning of filter elements with the help of pulse gas leading Cleaning lances according to the preamble of patent claims 1 and 2.
  • the pulse gas is via a a pulse gas line secured by a shut-off device Pulse gas container removed and in counterflow to the cleaning gas through a single filter element or a Group of filter elements blown at short notice.
  • Pulse gas container removed and in counterflow to the cleaning gas through a single filter element or a Group of filter elements blown at short notice.
  • By on pulse gas flow generated in this way becomes the filter cake of blown off the filter elements.
  • the amount of that in that Pulse gas that is injected into the filter element is determined by the Size and opening time of the shut-off device. It's like that device known from WO 88/07404 each Cleaning lance only one with a single shut-off device provided pulse gas line, so is the Pulse gas throughput and the level of the pulse during the Cleaning phase specified.
  • large Filter units with correspondingly large groups of Filter elements such an arrangement prone to failure and requires a large and expensive fitting.
  • the invention has for its object that Cleaning behavior of the generic device improve and the procedural conditions of Filter.
  • shut-off devices Due to the different control times of the parallel switched shut-off devices can arise from the pulse gas flow resulting cleaning impulse in its temporal course to be influenced.
  • all shut-off devices open, so it turns due to the increased pulse gas throughput a high pressure pulse, the one Detachment of the filter cake from the filter elements causes.
  • the specified size of the shut-off device determines the activation time the pulse gas throughput, so that the amount of pulse gas through the Number and size of shut-off devices connected in parallel can vary. Closes one of the shut-off devices while the remaining are still open, it will decrease due to the now reduced throughput the pressure level of the Cleaning impulse. This reduced pulse prevents one Redeposition of the detached dust on the straight cleaned filter elements.
  • the pulse height and the Pulse gas consumption can be optimally adjusted and the procedural conditions of the filter, e.g. B. the Degree of pollution, adjust.
  • the device according to the invention is relatively small Faucets with a time behavior that is favorable for cleaning be used. In the event of a failure of one of the shut-off devices is still a limited cleaning of the concerned Filter elements possible.
  • a filter shown only schematically and partially Cleaning of dust-laden raw gas contains one Filter container 1, whose interior z. B. through a perforated plate 2 is divided into a raw gas space and a clean gas space 4.
  • On the perforated plate 2 are filter elements in the form of hollow cylindrical filter candles 5 hung up. Filter bags can also be used as filter elements be used.
  • the filter candles 5 protrude into the raw gas space 3 into it, while the open end of the filter candles 5 in the Clean gas room 4 opens out. That through an inlet nozzle in flows through the raw gas chamber 3 abandoned dust-laden raw gas the filter candles 5, the dust present on the Outside of the filter cartridges 5.
  • the dust-free one Clean gas enters the clean gas room 4 and is from there discharged an outlet nozzle.
  • the clean gas space 4 of the filter can also be formed by channels be arranged in the filter container 1 and on which the filter candles 5 stand up.
  • the filter candles can Groups with a common discharge of the clean gas be summarized. The process of dust separation and the The cleaning described below is for this filter basically the same as that shown in Fig. 1 Filter.
  • the dust accumulating on the filter candles 5 must be in time intervals are removed.
  • about Cleaning lances 6 in the filter candles 5 against The direction of flow of the pure gas is injected with a pulse gas Pressure exceeds the pressure of the raw gas.
  • This pulse gas is in a pulse gas container 7 provided.
  • Pulse gas line 8 are the individual cleaning lances 6 connected to the pulse gas container 7.
  • Each pulse gas line 8 is connected by a drive 9, 10 provided shut-off devices 11, 12 secured.
  • opening the shut-off devices 11, 12 is one of size and Opening time of the shut-off devices 11, 12 dependent amount Pulse gas supplied to the cleaning lance 6.
  • the shut-off devices 11, 12 are connected in parallel on the inlet and outlet side.
  • the Drives 9, 10 of the shut-off elements 11, 12 are over Control lines 13 with a common control unit 14 connected and are controlled by this.
  • shut-off elements 11, 12 are activated in such a way that that all shut-off devices 11, 12 open simultaneously and via a certain time, e.g. B. 100 ms are kept open. After that the first shut-off device 11 is closed, while the further or the other shut-off devices 12 remain open and after one Period of z. B. be closed a total of 200 ms.
  • Fig. 2 the pulse course is for different Controls of the shut-off devices 11, 12 shown. It shows the upper diagram the operating position (open - closed) of the shut-off devices 11, 12 depending on the Control time t. The diagram below shows the corresponding one temporal course of the pressure pulse p.

Description

Die Erfindung betrifft eine Vorrichtung und Verfahren zum Abreinigen von Filterelementen mit Hilfe von Pulsgas führenden Abreinigungslanzen gemäß dem Oberbegriff der Patentansprüche 1 und 2.The invention relates to an apparatus and method for Cleaning of filter elements with the help of pulse gas leading Cleaning lances according to the preamble of patent claims 1 and 2.

Bei einer derartigen Vorrichtung wird das Pulsgas über eine durch ein Absperrorgan abgesicherte Pulsgasleitung einem Pulsgasbehälter entnommen und im Gegenstrom zu dem zu reinigenden Gas durch ein einzelnes Filterelement oder einer Gruppe von Filterelementen kurzfristig geblasen. Durch den auf diese Weise erzeugten Pulsgasstrom wird der Filterkuchen von den Filterelementen abgesprengt. Die Menge des in das Filterelement eingeblasenen Pulsgases bestimmt sich nach der Größe und der Öffnungszeit des Absperrorganes. Ist wie bei der aus der WO 88/07404 bekannten Vorrichtung jeder Abreinigungslanze nur eine mit einem einzigen Absperrorgan versehene Pulsgasleitung zugeordnet, so ist der Pulsgasdurchsatz und die Höhe des Impulses während der Abreinigungsphase vorgegeben. Außerdem ist bei großen Filtereinheiten mit entsprechend großen Gruppen von Filterelementen eine solche Anordnung störungsanfällig und erfordert eine große und teure Armatur.In such a device, the pulse gas is via a a pulse gas line secured by a shut-off device Pulse gas container removed and in counterflow to the cleaning gas through a single filter element or a Group of filter elements blown at short notice. By on pulse gas flow generated in this way becomes the filter cake of blown off the filter elements. The amount of that in that Pulse gas that is injected into the filter element is determined by the Size and opening time of the shut-off device. It's like that device known from WO 88/07404 each Cleaning lance only one with a single shut-off device provided pulse gas line, so is the Pulse gas throughput and the level of the pulse during the Cleaning phase specified. In addition, large Filter units with correspondingly large groups of Filter elements such an arrangement prone to failure and requires a large and expensive fitting.

Der Erfindung liegt die Aufgabe zugrunde, das Abreinigungsverhalten der gattungsgemäßen Vorrichtung zu verbessern und den verfahrenstechnischen Bedingungen des Filters anzupassen.The invention has for its object that Cleaning behavior of the generic device improve and the procedural conditions of Filter.

Diese Aufgabe wird bei einer gattungsgemäßen Vorrichtung erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst. Ein Verfahren ist Gegenstand des Patentanspruches 2. This object is achieved in a generic device according to the invention by the characterizing features of Claim 1 solved. A procedure is the subject of Claim 2.

Durch die unterschiedlichen Ansteuerzeiten der parallel geschalteten Absperrorgane kann der sich aus dem Pulsgasstrom ergebende Abreinigungsimpuls in seinem zeitlichen Verlauf beeinflußt werden. Sind zu Beginn des Abreinigungsvorganges alle Absperrorgane geöffnet, so stellt sich aufgrund des erhöhten Pulsgasdurchsatzes ein hoher Druckimpuls ein, der ein Ablösen des Filterkuchens von den Filterelementen bewirkt. Bei vorgegebener Größe des Absperrorgans bestimmt die Ansteuerzeit den Pulsgasdurchsatz, so daß sich die Pulsgasmenge durch die Anzahl und die Größe der parallel geschalteten Absperrorgane variieren läßt. Schließt eines der Absperrorgane, während die übrigen noch geöffnet sind, so verringert sich aufgrund des nun verminderten Durchsatzes das Druckniveau des Abreinigungsimpulses. Dieser verringerte Impuls verhindert eine Wiederanlagerung des abgelösten Staubes an den gerade abgereinigten Filterelementen. Die Impulshöhe und der Pulsgasverbrauch lassen sich damit optimal einstellen und den verfahrenstechnischen Bedingungen des Filters, z. B. dem Verschmutzungsgrad, anzupassen. Darüber hinaus können im Rahmen der erfindungsgemäßen Vorrichtung verhältnismäßig kleine Armaturen mit einem für Abreinigung günstigen Zeitverhalten eingesetzt werden. Bei einem Ausfall eines der Absperrorgane ist immer noch eine eingeschränkte Abreinigung der betreffenden Filterelemente möglich.Due to the different control times of the parallel switched shut-off devices can arise from the pulse gas flow resulting cleaning impulse in its temporal course to be influenced. Are at the beginning of the cleaning process all shut-off devices open, so it turns due to the increased pulse gas throughput a high pressure pulse, the one Detachment of the filter cake from the filter elements causes. At The specified size of the shut-off device determines the activation time the pulse gas throughput, so that the amount of pulse gas through the Number and size of shut-off devices connected in parallel can vary. Closes one of the shut-off devices while the remaining are still open, it will decrease due to the now reduced throughput the pressure level of the Cleaning impulse. This reduced pulse prevents one Redeposition of the detached dust on the straight cleaned filter elements. The pulse height and the Pulse gas consumption can be optimally adjusted and the procedural conditions of the filter, e.g. B. the Degree of pollution, adjust. In addition, in the frame the device according to the invention is relatively small Faucets with a time behavior that is favorable for cleaning be used. In the event of a failure of one of the shut-off devices is still a limited cleaning of the concerned Filter elements possible.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert. Es zeigen

Fig. 1
den prinzipiellen Aufbau einer Vorrichtung zur Abreinigung von Filterkerzen und
Fig. 2
einen typischen zeitlichen Impulsverlauf.
An embodiment of the invention is shown in the drawing and is explained in more detail below. Show it
Fig. 1
the basic structure of a device for cleaning filter cartridges and
Fig. 2
a typical temporal course of impulses.

Ein nur schematisch und teilweise dargestelltes Filter zur Reinigung von staubbeladenem Rohgas enthält einen Filterbehälter 1, dessen Innenraum z. B. durch eine Lochplatte 2 in einem Rohgasraum und einen Reingasraum 4 aufgeteilt ist. An der Lochplatte 2 sind Filterelemente in Form von hohlzylindrischen, einseitig geschlossenen Filterkerzen 5 aufgehängt. Als Filterelemente können auch Filterschläuche verwendet werden. Die Filterkerzen 5 ragen in den Rohgasraum 3 hinein, während das offene Ende der Filterkerzen 5 in den Reingasraum 4 einmündet. Das durch einen Eintrittsstutzen in den Rohgasraum 3 aufgegebene staubbeladene Rohgas durchströmt die Filterkerzen 5, wobei der vorhandene Staub sich auf der Außenseite der Filterkerzen 5 anlagert. Das von Staub befreite Reingas tritt in den Reingasraum 4 ein und wird von dort über einen Austrittsstutzen abgeführt.A filter shown only schematically and partially Cleaning of dust-laden raw gas contains one Filter container 1, whose interior z. B. through a perforated plate 2 is divided into a raw gas space and a clean gas space 4. On the perforated plate 2 are filter elements in the form of hollow cylindrical filter candles 5 hung up. Filter bags can also be used as filter elements be used. The filter candles 5 protrude into the raw gas space 3 into it, while the open end of the filter candles 5 in the Clean gas room 4 opens out. That through an inlet nozzle in flows through the raw gas chamber 3 abandoned dust-laden raw gas the filter candles 5, the dust present on the Outside of the filter cartridges 5. The dust-free one Clean gas enters the clean gas room 4 and is from there discharged an outlet nozzle.

Der Reingasraum 4 des Filters kann auch durch Kanäle gebildet sein, die in dem Filterbehälter 1 angeordnet sind und auf denen die Filterkerzen 5 aufstehen. Dabei können die Filterkerzen zu Gruppen mit einer gemeinsamen Abführung des Reingases zusammengefaßt werden. Der Vorgang der Staubtrennung und der nachfolgend beschriebenen Abreinigung ist bei diesem Filter grundsätzlich der gleiche wie bei dem in Fig. 1 dargestellten Filter.The clean gas space 4 of the filter can also be formed by channels be arranged in the filter container 1 and on which the filter candles 5 stand up. The filter candles can Groups with a common discharge of the clean gas be summarized. The process of dust separation and the The cleaning described below is for this filter basically the same as that shown in Fig. 1 Filter.

Der sich an den Filterkerzen 5 anlagernde Staub muß in zeitlichen Abstände entfernt werden. Zu diesem Zweck wird über Abreinigungslanzen 6 in die Filterkerzen 5 entgegen der Strömungsrichtung des Reingases ein Pulsgas eingeblasen, dessen Druck den Druck des Rohgases übersteigt. Dieses Pulsgas wird in einem Pulsgasbehälter 7 bereit gestellt. Über jeweils eine Pulsgasleitung 8 sind die einzelnen Abreinigungslanzen 6 mit dem Pulsgasbehälter 7 verbunden.The dust accumulating on the filter candles 5 must be in time intervals are removed. For this purpose, about Cleaning lances 6 in the filter candles 5 against The direction of flow of the pure gas is injected with a pulse gas Pressure exceeds the pressure of the raw gas. This pulse gas is in a pulse gas container 7 provided. About one at a time Pulse gas line 8 are the individual cleaning lances 6 connected to the pulse gas container 7.

Jede Pulsgasleitung 8 ist durch mehrere mit einem Antrieb 9, 10 versehene Absperrorgane 11, 12 abgesichert. Bei einem Öffnen der Absperrorgane 11, 12 wird eine von der Größe und der Öffnungszeit der Absperrorgane 11, 12 abhängige Menge an Pulsgas der Abreinigungslanze 6 zugeführt. Die Absperrorgane 11, 12 sind ein- und austrittsseitg parallel geschaltet. Die Antriebe 9, 10 der Absperrorgane 11, 12 sind über Steuerleitungen 13 mit einer gemeinsamen Steuereinheit 14 verbunden und werden von dieser angesteuert.Each pulse gas line 8 is connected by a drive 9, 10 provided shut-off devices 11, 12 secured. When opening the shut-off devices 11, 12 is one of size and Opening time of the shut-off devices 11, 12 dependent amount Pulse gas supplied to the cleaning lance 6. The shut-off devices 11, 12 are connected in parallel on the inlet and outlet side. The Drives 9, 10 of the shut-off elements 11, 12 are over Control lines 13 with a common control unit 14 connected and are controlled by this.

Die Ansteuerung der Absperrorgane 11, 12 erfolgt in der Weise, daß alle Absperrorgane 11, 12 gleichzeitig öffnen und über eine bestimmte Zeit, z. B. 100 ms offen gehalten werden. Danach wird das erste Absperrorgan 11 geschlossen, während das weitere oder die weiteren Absperrorgane 12 geöffnet bleiben und nach einer Zeitdauer von z. B. insgesamt 200 ms geschlossen werden.The shut-off elements 11, 12 are activated in such a way that that all shut-off devices 11, 12 open simultaneously and via a certain time, e.g. B. 100 ms are kept open. After that the first shut-off device 11 is closed, while the further or the other shut-off devices 12 remain open and after one Period of z. B. be closed a total of 200 ms.

In der Fig. 2 ist der Impulsverlauf für unterschiedliche Ansteuerungen der Absperrorgane 11, 12 dargestellt. Dabei zeigt das obere Diagramm die Betriebsstellung (geöffnet - geschlossen) der Absperrorgane 11, 12 in Abhängigkeit von der Ansteuerzeit t. Das untere Diagramm zeigt den dazu gehörenden zeitlichen Verlauf des Druckimpulses p auf.In Fig. 2 the pulse course is for different Controls of the shut-off devices 11, 12 shown. It shows the upper diagram the operating position (open - closed) of the shut-off devices 11, 12 depending on the Control time t. The diagram below shows the corresponding one temporal course of the pressure pulse p.

Im Fall I werden die beiden in Fig. 1 gezeigten Absperrorgane 11, 12 mit gleicher Dauer angesteuert. Es ergibt sich praktisch eine Verdoppelung der Durchflußmenge eines einzelnen Absperrorgans. Der Druckimpuls bleibt im wesentlichen gleich hoch. Werden gemäß der Erfindung (Fall II) die beiden Absperrorgane 11, 12 gleichzeitig jedoch mit unterschiedlicher Impulsdauer angesteuert, so ergibt sich ein anderer Verlauf, bei dem zunächst ein hoher Impuls zum Ablösen des an den Filterkerzen 5 anhaftenden Filterkuchens aufgebracht wird. Schließt das erste Absperrorgan 11, stellt sich ein geringeres Druckniveau ein, das eine Wiederanlagerung des abgelösten Staubes verhindert. Mit dieser Betriebsweise läßt sich der Verbrauch an Pulsgas minimieren.In case I, the two shut-off devices shown in Fig. 1 11, 12 driven with the same duration. It is practical a doubling of the flow rate of an individual Shut-off device. The pressure pulse remains essentially the same high. According to the invention (case II) the two Shut-off devices 11, 12 at the same time, however, with different Controlled pulse duration, there is a different course, where first a high impulse for releasing the to the Filter candles 5 adhering filter cake is applied. If the first shut-off device 11 closes, a smaller one is produced Pressure level, which is a reintegration of the detached Prevents dust. With this mode of operation, the Minimize consumption of pulse gas.

Claims (2)

  1. Device for the cleaning down of filter elements with the assistance of cleaning lances (6) which conduct pulse gas and which are each connected with a pulse gas container (7) by way of a respective pulse gas duct (8), in which a blocking element (11) controllable in drive by way of a control unit (14) is arranged, characterised in that at least one further blocking element (12) is connected in parallel with the blocking element (11) at the inlet end and outlet end and is controllable in drive by way of the same control unit (14) in the manner that all blocking elements (11, 12) are controllable in drive simultaneously and with different pulse duration.
  2. Method for cleaning down filter elements with the assistance of a pulse gas of increased pressure, characterised in that the pulse gas flow fed to a filter element or a group of filter elements is divided into several part flows and that one or more of the part flows is switched off in time before the remaining part flow or flows.
EP96111477A 1995-10-21 1996-07-17 Device and process for cleaning filter elements Expired - Lifetime EP0769318B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19539277A DE19539277A1 (en) 1995-10-21 1995-10-21 Device and method for cleaning filter elements
DE19539277 1995-10-21

Publications (2)

Publication Number Publication Date
EP0769318A1 EP0769318A1 (en) 1997-04-23
EP0769318B1 true EP0769318B1 (en) 2001-01-24

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EP96111477A Expired - Lifetime EP0769318B1 (en) 1995-10-21 1996-07-17 Device and process for cleaning filter elements

Country Status (6)

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US (1) US5843206A (en)
EP (1) EP0769318B1 (en)
JP (1) JP3831876B2 (en)
DE (2) DE19539277A1 (en)
DK (1) DK0769318T3 (en)
ES (1) ES2153920T3 (en)

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US6056797A (en) * 1998-06-12 2000-05-02 Richard; Kenneth L. Dust collector filter cleaning control system
US6824596B2 (en) * 2003-02-19 2004-11-30 Jan Strmen Gas scrubbing device for odorizing equipment operation, service and emergency
US6840974B2 (en) * 2003-03-14 2005-01-11 Spirent Communications Of Rockville, Inc. Self-cleaning filter
PL1997547T3 (en) * 2007-06-01 2011-04-29 Balcke Duerr Gmbh Method for filter backflushing
CN101816867B (en) * 2010-01-25 2012-06-20 江苏新中环保股份有限公司 Impulse injection control method in bag-type duster
CN108771922A (en) * 2018-07-02 2018-11-09 黑龙江兰德超声科技股份有限公司 Industrial waste gas processing dust accumulation recycle device
US11123678B2 (en) 2021-05-04 2021-09-21 GPL Odorizers LLC Air filtration device

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DE43417C (en) * FRITZ Freiherr VON WECHMAR in Hannover, Josefstr. 9 letter box
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DE2709204A1 (en) * 1977-03-03 1978-09-07 Hess Gerhard Ing Grad PROCEDURE FOR CLEANING FLOWING GASES AND APPARATUS
CH625969A5 (en) * 1977-07-15 1981-10-30 Buehler Ag Geb
CH642559A5 (en) * 1979-08-08 1984-04-30 Mueller Hans Drm Dr Ag METHOD OF CLEANING FILTER ELEMENTS.
DE3025548A1 (en) * 1980-07-05 1982-01-21 Degussa Ag, 6000 Frankfurt METHOD FOR CLEANING FILTER CLOTHES BY MEANS OF PRESSURE GAS IMPULS FOR SOLID DETECTION FROM GASES
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DE8709484U1 (en) * 1987-07-09 1987-11-12 Zenga, Giovanni Battista, Pino Torinese, Turin/Torino, It
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JPH0559828A (en) * 1991-08-29 1993-03-09 Gifu Kogyo Kk Purified space housing unit
JPH06253721A (en) * 1991-12-19 1994-09-13 Fukumori Pan Kenkyusho:Kk Bread making
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Also Published As

Publication number Publication date
ES2153920T3 (en) 2001-03-16
JPH09141029A (en) 1997-06-03
DE59606370D1 (en) 2001-03-01
DE19539277A1 (en) 1997-04-24
DK0769318T3 (en) 2001-04-09
JP3831876B2 (en) 2006-10-11
EP0769318A1 (en) 1997-04-23
US5843206A (en) 1998-12-01

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